This photograph draws me in because of the intense color in the center and the lack of color around the edges.  Even though there is not a lot of interest in the bottom right hand corner where the eye is first drawn I feel like that is intentional because it slowly prepares the eye for the intensity of the color.  Being drawn next to the dripping paint before taking in the full splotches of color is pleasing to the viewer.  The use of primary colors is also interesting, I don't know if these colors are necessarily aesthetically pleasing however they are common colors that everyone is used to which may have some sort of cognitive appeal.